There have been quite a few posts related to issues installing the VirtualBox Extension Pack for both Windows and Linux hosts.
- http://forums.virtualbox.org/viewtopic.php?p=11262&sid;=334fb962995ae00d32bb8988192f701c
- http://www.virtualbox.org/ticket/7899
- http://www.virtualbox.org/ticket/7972
- http://blogs.oracle.com/wim/2010/12/oracle_vm_virtualbox_40_extens.html
The error message given is very cryptic:
"Failed to install the Extension Pack" NS_ERROR_FAILURE (0x80004005)
Weird.
In digging through the above posts I found tidbits of the solution that I was able to put together. I'm currently running a Ubuntu 10.10 x64, so here's how I solved the problem and installed the extension pack. Give the VBoxExtPackHelperApp execute permissions and then run the install from the command line.
- sudo chmod 744 /usr/lib/virtualbox/VBoxExtPackHelperApp
- sudo /usr/lib/virtualbox/VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.0.4-70112.vbox-extpack